Codacy

Codacy is an automated code review tool that helps identify issues through static code analysis. Integrating seamlessly into workflows, Codacy helps engineering teams save time in code reviews and tackle technical debt.
Users receive notifications on security issues, code coverage, code duplication and code complexity in every commit and pull request along with advanced code metrics on the health of a project and team performance.
Codacy supports more than 30 coding languages and is available in free open-source, startup and enterprise versions (cloud and self-hosted).